Laminated glass



Jan. 10, 1928.,

1,655,933 Hf E. ALLEN LAMINATED GLASS l Filed June 26. 1926 Horace E H//em amar im. io, reas.l

PAU-:Nr oFFIYCE..

HORACE OF TOLEDO, OHIO, vASSIGI'NOIR, 'IO.'IEE LIIBBEY-OWENS SHEET GLASS A COMPANY, OE TOLEDO, OHIO, A. CORPORATION OF OHIO.

rAMrNArEn GLASsf applicati@ marianne 26,1926. serial No. navali. k

Ilhe present invention relates to laminated f lfass,l and tothe process of producing the same. a

du important object' of the invention is ll to provide, as a new articleof manufacture,

ay sheet of laminated glass and a process Of..

producing the saine, wherein a plurality of sheets of glass and a sheet of relatively .non-brittle` material are united.v

Another object ofthe invention is to provide an article and process of producing the p same, wherein a sheet of glass and a lsheet of non-brittle material are united with the assistance of tetralin.

A further object of the invention is to provide a process wherein a sheet'of glass is preferably provided with a skin of material such as a cellulose composition materiah and then combining the skin to a sheet of nonm brittle material such as a cellulose .composition material by coating one or both of said sheets with a lm of tetralin, after which the sheets may be united7 preferably under the action of heat and pressure. an

lll

vention will become apparent during the course of the following description.

'ln the drawings wherein like numerals are employed 'to designate like parts throughout the'same,

liig..` l is a -fragmentary 'sectional' view I" illustrating a sheet of laminated' glass formedin accordance with the present invention,

as a windshield of an automobile vor other vehicle, it is preferable to grind and polish t5 at least the outer surfaces or exposed surfaces of the nished product. A sheetoflaminated glass, when prepared properly, offers considerable resistanceto. shock and blow, and even though'the glass sheets are frac- 5@ tured, if the union between the glass and the intervening ymember is proper, the greater portion, at least, of the glass will remain on 'said intervening member, thus preventing injury, etc.

@ther objects ,and advantages of the in? vor tetra-hydro-naphthalene.

lEig. 2 is a similar view of a. sheet ofbullet tliejdrawings the numerals 5 and `6v The intervening member Zlmay be any suitable relatively non-brittle material NIVsuch as a cellulose composition material including cellulose nitrate, cellulose acetate, and the other products of the cellulose family; The cellulose compositionl materials mentioned..

`are transparent, and form a good intervening member for a sheetof laminated glass. Uf course' any other substance having the same general character can be used.

Tp effect an eiicient union or bond between the 'sheets of glass and the sheet of non-brittle material, one surface each ofthe j two sheets of glass is provided'with a skin 8. The skin 8 is preferably a cellulose composition material, and is preferably applied as by spraying the material in solutlon upon the sheets of glass. Of course thefskin need not necessarily bea cellulose composition 'material I considenit desirable, although not necessary, to dry the skin 8 before it is 75 united to the non-brittle sheet 7. The nonbrittle sheet 7 may or may not, as desired, be treated to. form a similar skin thereon. After the skin 8 has been; formed on the slieet, it is coated with 'a iilm 9 of'tetralin 30 Tetralin is a stable water white oily liquid with a boiling^ point of approximately 400 degrees F., whic makes it exceptionally well fitted. for this particular use.

Afterthe film. of tetralin has been applied to the skin 8 and to the sheet of non", brittle material 7, if desired the laminations are-united, preferably under the action ofheat and pressure. This union may be accomplished by placing the laminations in a suitable press and pressed together. In this manner all excess tetralin .will be' s ueezed out, and to prevent the trapping di tetralin between the laminations, the press used may be constructed to exert its initial pressure on the sheet centrally thereof.

lnFig. 2 is illustrated what is @own in,l the artas bullet proof glass which comprises a central relatively heavy sheet 10 and two 100 relatively thin outer sheets 1l and l2 respectively. Sheets of non-brittle material 13' are interposed between the three sheets of glass, while the sheets of glass are treatedV to` .form skins lllthereon similar to the 'skins 8in Fig. l. In this type of sheet the center sheet of glass 10 will be provided l. of tetralin are used in a manner similar glass above outlined. t

to the production of the ordinary laminated in accordance with thisn process, a finished productwill be produced capable of withstanding normal temperatures without. de-

veloping so-called letQgoesF The -iinion between the skin of cellulose material and tthe sheet of non-brittle material will be effective vand permanent. y

It is to be understood that the Aform of the invention herewith shown and described is to be taken as thel preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.`

Claims: p

1. As a new article of manufacture, a sheet,`

of laminated glass including a sheet of glass having a skin of material thereon which has 4 Y been coated with a film of tetralin. In forming a sheet of laminated glass 2. As a new article o f manufacture, a sheet of laminated glass including a sheet fof glass having la skin of cellulose composition material thereon which has been treated with a film of tetralin.

,3. As a new article of manufacture, a sheet of laminated glass including tetralin.

` 4. As a new article of manufacture, a sheet of laminated glass including a film `of tetralin.

5. As a new article of manufacture, a sheet of laminated glass comprising a sheet of glass, a skin thereon, a film of tetralin, and a sheet of non-brittle material.

Signed at Toledo, in the county of Lucas and State of Ohio, this 24th day of June,

HORACE E. ALLEN. 

